What prescription drugs could interfere and cause a positive morphine (opiates) test?
Codeine and Meperidine are structurally related to morphine therefore causing presumptive positive results. Codeine is a commonly prescribed pain medication and is also the active ingredient in some prescription cough medicines. These forms of codeine can also be addictive and abused. A GC/MS confirmation of a presumptive positive EMIT opiates screen can determine if heroin use is indicated.
